It is advised that this be located in a visible place that can receive satellite signals, however, you can mount this anywhere it picks up a signal.. i.e. like under dash so long as a good (green lamp) signal is obtained. There is 4 feet of cable in which to work with so finding a location should be fairly easy. Results may vary depending on location of unit, location of vehicle and other factors not associated with the device itself. Mainly used for old-school restomods where original equipment isn't convenient to use.